:root {
      --bg-main: #060b19;
      --bg-card: rgba(14, 25, 48, 0.85);
      --bg-card-hover: rgba(20, 36, 68, 0.95);
      --primary: #00f2fe;
      --secondary: #4facfe;
      --accent-neon: #39ff14;
      --accent-purple: #7928ca;
      --accent-pink: #ff007f;
      --text-main: #f0f6fc;
      --text-muted: #8b9bb4;
      --border-glow: rgba(0, 242, 254, 0.25);
      --border-glow-hover: rgba(0, 242, 254, 0.6);
      --box-shadow-neon: 0 0 25px rgba(0, 242, 254, 0.2);
      --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      background-color: var(--bg-main);
      background-image: 
        radial-gradient(circle at 15% 20%, rgba(0, 242, 254, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 85% 60%, rgba(255, 0, 127, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 50% 90%, rgba(57, 255, 20, 0.05) 0%, transparent 50%);
      background-attachment: fixed;
      color: var(--text-main);
      font-family: var(--font-family);
      line-height: 1.6;
      overflow-x: hidden;
    }

    .container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.3s ease;
    }

    /* 顶部导航 */
    header.site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(6, 11, 25, 0.88);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-glow);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-logo-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .ai-page-logo {
      height: 38px;
      width: auto;
      display: block;
      filter: drop-shadow(0 0 8px var(--primary));
    }
    .brand-title {
      font-size: 1.3rem;
      font-weight: 800;
      letter-spacing: 0.5px;
      background: linear-gradient(90deg, var(--primary), #ffffff);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }
    .nav-links li a {
      padding: 8px 14px;
      font-size: 0.95rem;
      color: var(--text-muted);
      border-radius: 6px;
      display: inline-block;
    }
    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--primary);
      text-shadow: 0 0 10px rgba(0, 242, 254, 0.5);
    }
    .nav-btn-group {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn-neon {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.95rem;
      font-weight: 600;
      color: #060b19;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      border: none;
      border-radius: 30px;
      cursor: pointer;
      box-shadow: 0 0 15px rgba(0, 242, 254, 0.4);
      transition: all 0.3s ease;
    }
    .btn-neon:hover {
      box-shadow: 0 0 25px rgba(0, 242, 254, 0.8);
      transform: translateY(-2px);
    }
    .btn-outline {
      padding: 9px 20px;
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--primary);
      background: transparent;
      border: 1px solid var(--primary);
      border-radius: 30px;
      box-shadow: inset 0 0 10px rgba(0, 242, 254, 0.2);
    }
    .btn-outline:hover {
      background: rgba(0, 242, 254, 0.15);
      box-shadow: 0 0 15px rgba(0, 242, 254, 0.4);
      transform: translateY(-2px);
    }
    .menu-toggle {
      display: none;
      background: transparent;
      border: none;
      color: var(--primary);
      font-size: 1.6rem;
      cursor: pointer;
    }

    /* 首屏 Hero (无图，纯CSS与荧光特效) */
    .hero-section {
      padding: 90px 0 60px;
      text-align: center;
      position: relative;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      background: rgba(0, 242, 254, 0.08);
      border: 1px solid var(--border-glow);
      border-radius: 50px;
      color: var(--primary);
      font-size: 0.88rem;
      margin-bottom: 24px;
      box-shadow: 0 0 15px rgba(0, 242, 254, 0.15);
    }
    .hero-badge span.pulse-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--accent-neon);
      box-shadow: 0 0 10px var(--accent-neon);
      animation: pulseAnim 1.8s infinite;
    }
    @keyframes pulseAnim {
      0% { transform: scale(0.9); opacity: 0.6; }
      50% { transform: scale(1.3); opacity: 1; }
      100% { transform: scale(0.9); opacity: 0.6; }
    }
    .hero-title {
      font-size: 2.8rem;
      font-weight: 900;
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: 0.5px;
      color: #ffffff;
      text-shadow: 0 0 20px rgba(0, 242, 254, 0.4);
    }
    .hero-subtitle {
      font-size: 1.15rem;
      color: var(--text-muted);
      max-width: 820px;
      margin: 0 auto 36px;
      line-height: 1.8;
    }
    .hero-cta-wrap {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 20px;
      flex-wrap: wrap;
      margin-bottom: 50px;
    }
    .hero-cta-btn {
      padding: 14px 36px;
      font-size: 1.1rem;
      font-weight: 700;
    }
    .hero-features-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
      margin-top: 30px;
    }
    .hero-stat-card {
      background: var(--bg-card);
      border: 1px solid var(--border-glow);
      border-radius: 12px;
      padding: 24px 16px;
      position: relative;
      overflow: hidden;
      box-shadow: var(--box-shadow-neon);
      transition: transform 0.3s;
    }
    .hero-stat-card:hover {
      transform: translateY(-4px);
      border-color: var(--primary);
    }
    .hero-stat-card::after {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 2px;
      background: linear-gradient(90deg, transparent, var(--primary), transparent);
    }
    .stat-number {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--primary);
      text-shadow: 0 0 15px rgba(0, 242, 254, 0.6);
      margin-bottom: 4px;
      font-family: monospace;
    }
    .stat-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* 通用章节 */
    section.section-block {
      padding: 70px 0;
      position: relative;
    }
    .section-header {
      text-align: center;
      margin-bottom: 48px;
    }
    .section-tag {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 700;
      color: var(--primary);
      text-transform: uppercase;
      letter-spacing: 2px;
      margin-bottom: 8px;
      text-shadow: 0 0 8px rgba(0, 242, 254, 0.4);
    }
    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: #ffffff;
      margin-bottom: 12px;
    }
    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
      max-width: 680px;
      margin: 0 auto;
    }

    /* 卡片网格通用 */
    .card-grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .card-grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .glass-card {
      background: var(--bg-card);
      border: 1px solid var(--border-glow);
      border-radius: 12px;
      padding: 24px;
      transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
      position: relative;
    }
    .glass-card:hover {
      border-color: var(--border-glow-hover);
      box-shadow: 0 10px 30px rgba(0, 242, 254, 0.18);
      transform: translateY(-4px);
    }

    /* 关于与平台介绍 */
    .about-box {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      align-items: center;
    }
    .about-info-title {
      font-size: 1.6rem;
      color: #ffffff;
      margin-bottom: 16px;
    }
    .about-list {
      list-style: none;
      margin-top: 20px;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .about-list li {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 0.95rem;
      color: #d1d9e6;
    }
    .about-list li::before {
      content: "✔";
      color: var(--accent-neon);
      font-weight: bold;
      text-shadow: 0 0 6px var(--accent-neon);
    }
    .platform-media-wrap {
      border-radius: 12px;
      overflow: hidden;
      border: 1px solid var(--border-glow);
      box-shadow: 0 0 20px rgba(0, 242, 254, 0.2);
    }
    .platform-media-wrap img {
      width: 100%;
      height: auto;
      display: block;
      transition: transform 0.4s ease;
    }
    .platform-media-wrap:hover img {
      transform: scale(1.02);
    }

    /* 聚合模型标签墙 */
    .model-tags-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 30px;
    }
    .model-pill {
      background: rgba(14, 25, 48, 0.9);
      border: 1px solid rgba(0, 242, 254, 0.2);
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 0.85rem;
      color: var(--primary);
      box-shadow: 0 0 8px rgba(0, 242, 254, 0.1);
      transition: all 0.2s;
    }
    .model-pill:hover {
      background: var(--primary);
      color: #060b19;
      box-shadow: 0 0 15px var(--primary);
      font-weight: bold;
    }

    /* AIGC 服务场景 */
    .service-card-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .service-badge {
      font-size: 0.75rem;
      padding: 2px 8px;
      background: rgba(0, 242, 254, 0.15);
      color: var(--primary);
      border-radius: 4px;
      border: 1px solid var(--border-glow);
    }
    .service-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 流程与网络 */
    .step-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .step-card {
      text-align: center;
      padding: 28px 18px;
      background: var(--bg-card);
      border: 1px solid var(--border-glow);
      border-radius: 12px;
      position: relative;
    }
    .step-num {
      width: 44px;
      height: 44px;
      line-height: 44px;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      color: #060b19;
      font-weight: 800;
      border-radius: 50%;
      margin: 0 auto 16px;
      box-shadow: 0 0 15px var(--primary);
    }
    .step-title {
      font-size: 1.05rem;
      color: #ffffff;
      margin-bottom: 8px;
    }
    .step-desc {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* 行业方案图文 */
    .solution-box {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
    }
    .solution-item {
      display: flex;
      gap: 16px;
      background: var(--bg-card);
      border: 1px solid var(--border-glow);
      border-radius: 12px;
      padding: 20px;
    }
    .solution-thumb {
      width: 140px;
      flex-shrink: 0;
      border-radius: 8px;
      overflow: hidden;
    }
    .solution-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }
    .solution-content h3 {
      font-size: 1.1rem;
      color: #ffffff;
      margin-bottom: 6px;
    }
    .solution-content p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 对比评测高亮 */
    .evaluation-card {
      background: linear-gradient(180deg, rgba(14, 25, 48, 0.9), rgba(6, 11, 25, 0.95));
      border: 1px solid var(--border-glow);
      border-radius: 16px;
      padding: 32px;
      box-shadow: 0 0 30px rgba(0, 242, 254, 0.15);
    }
    .eval-score-bar {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding-bottom: 24px;
      margin-bottom: 24px;
      border-bottom: 1px solid rgba(0, 242, 254, 0.15);
      flex-wrap: wrap;
      gap: 16px;
    }
    .eval-highlight {
      font-size: 2.2rem;
      font-weight: 900;
      color: var(--accent-neon);
      text-shadow: 0 0 15px var(--accent-neon);
    }
    .eval-stars {
      color: #ffd700;
      font-size: 1.5rem;
      letter-spacing: 4px;
      text-shadow: 0 0 10px #ffd700;
    }
    .table-responsive {
      width: 100%;
      overflow-x: auto;
    }
    table.compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 620px;
    }
    table.compare-table th, 
    table.compare-table td {
      padding: 14px 18px;
      border-bottom: 1px solid rgba(0, 242, 254, 0.1);
      font-size: 0.92rem;
    }
    table.compare-table th {
      background: rgba(0, 242, 254, 0.08);
      color: var(--primary);
    }
    table.compare-table td.brand-col {
      color: var(--primary);
      font-weight: 700;
      background: rgba(0, 242, 254, 0.04);
    }

    /* 需求匹配与表单 */
    .form-section-wrap {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 36px;
      align-items: start;
    }
    .form-box {
      background: var(--bg-card);
      border: 1px solid var(--border-glow);
      border-radius: 14px;
      padding: 30px;
      box-shadow: var(--box-shadow-neon);
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-group label {
      display: block;
      font-size: 0.9rem;
      color: #d1d9e6;
      margin-bottom: 6px;
    }
    .form-control {
      width: 100%;
      padding: 12px 16px;
      background: rgba(6, 11, 25, 0.7);
      border: 1px solid rgba(0, 242, 254, 0.3);
      border-radius: 8px;
      color: #ffffff;
      font-size: 0.95rem;
      outline: none;
      transition: all 0.3s;
    }
    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 12px rgba(0, 242, 254, 0.5);
    }
    textarea.form-control {
      resize: vertical;
      min-height: 100px;
    }

    /* FAQ 手风琴 */
    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 14px;
      max-width: 900px;
      margin: 0 auto;
    }
    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-glow);
      border-radius: 8px;
      overflow: hidden;
      transition: all 0.3s ease;
    }
    .faq-question {
      padding: 16px 20px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 600;
      color: #ffffff;
      user-select: none;
    }
    .faq-question:hover {
      color: var(--primary);
    }
    .faq-question span.toggle-icon {
      font-size: 1.2rem;
      color: var(--primary);
      transition: transform 0.3s ease;
    }
    .faq-answer {
      display: none;
      padding: 0 20px 18px;
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
      border-top: 1px solid rgba(0, 242, 254, 0.08);
      padding-top: 12px;
    }
    .faq-item.active .faq-answer {
      display: block;
    }
    .faq-item.active .toggle-icon {
      transform: rotate(45deg);
    }

    /* 客户评价网格 */
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 22px;
    }
    .comment-card {
      background: var(--bg-card);
      border: 1px solid var(--border-glow);
      border-radius: 12px;
      padding: 24px;
      position: relative;
    }
    .comment-author {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }
    .avatar-placeholder {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary), var(--accent-purple));
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      color: #ffffff;
      box-shadow: 0 0 10px rgba(0, 242, 254, 0.4);
    }
    .author-meta h4 {
      font-size: 0.95rem;
      color: #ffffff;
    }
    .author-meta span {
      font-size: 0.8rem;
      color: var(--primary);
    }
    .comment-text {
      font-size: 0.88rem;
      color: #c4d1e2;
      line-height: 1.6;
    }

    /* 文章资讯与外链 */
    .article-links-grid {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 14px;
      margin-top: 20px;
    }
    .article-item {
      background: var(--bg-card);
      border: 1px solid var(--border-glow);
      border-radius: 8px;
      padding: 14px;
      text-align: center;
      font-size: 0.85rem;
      color: #d1d9e6;
      display: block;
    }
    .article-item:hover {
      border-color: var(--primary);
      color: var(--primary);
      box-shadow: 0 0 12px rgba(0, 242, 254, 0.3);
      transform: translateY(-2px);
    }

    /* 浮动客服入口与返回顶部 */
    .floating-widget {
      position: fixed;
      right: 20px;
      bottom: 25px;
      z-index: 9999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .float-btn {
      width: 48px;
      height: 48px;
      background: rgba(6, 11, 25, 0.9);
      border: 1px solid var(--primary);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      cursor: pointer;
      box-shadow: 0 0 15px rgba(0, 242, 254, 0.3);
      transition: all 0.3s;
    }
    .float-btn:hover {
      background: var(--primary);
      color: #060b19;
      box-shadow: 0 0 25px var(--primary);
    }
    .qr-modal {
      display: none;
      position: absolute;
      right: 60px;
      bottom: 0;
      background: #0d192f;
      border: 1px solid var(--primary);
      border-radius: 8px;
      padding: 12px;
      box-shadow: 0 0 25px rgba(0, 242, 254, 0.4);
      width: 140px;
      text-align: center;
    }
    .qr-modal img {
      width: 100%;
      height: auto;
      display: block;
      border-radius: 4px;
    }
    .qr-modal span {
      font-size: 0.75rem;
      color: var(--text-main);
      display: block;
      margin-top: 6px;
    }

    /* 页脚 */
    footer.site-footer {
      background: #040710;
      border-top: 1px solid rgba(0, 242, 254, 0.2);
      padding: 50px 0 25px;
      color: var(--text-muted);
      font-size: 0.88rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 30px;
      margin-bottom: 40px;
    }
    .footer-col h4 {
      color: #ffffff;
      font-size: 1rem;
      margin-bottom: 16px;
      font-weight: 700;
    }
    .footer-col ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .footer-col ul li a:hover {
      color: var(--primary);
    }
    .friend-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      padding: 16px 0;
      border-top: 1px solid rgba(0, 242, 254, 0.1);
      margin-bottom: 20px;
    }
    .friend-links-wrap a {
      color: var(--text-muted);
      font-size: 0.85rem;
    }
    .friend-links-wrap a:hover {
      color: var(--primary);
    }
    .copyright-wrap {
      text-align: center;
      padding-top: 20px;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      font-size: 0.82rem;
    }

    /* 响应式媒体查询 */
    @media (max-width: 992px) {
      .hero-title { font-size: 2.2rem; }
      .hero-features-grid { grid-template-columns: repeat(2, 1fr); }
      .card-grid-3, .testimonials-grid { grid-template-columns: repeat(2, 1fr); }
      .card-grid-4 { grid-template-columns: repeat(2, 1fr); }
      .step-grid { grid-template-columns: repeat(2, 1fr); }
      .article-links-grid { grid-template-columns: repeat(3, 1fr); }
      .about-box, .solution-box, .form-section-wrap { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 768px) {
      .menu-toggle { display: block; }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: rgba(6, 11, 25, 0.98);
        border-bottom: 1px solid var(--border-glow);
        flex-direction: column;
        padding: 16px 0;
      }
      .nav-links.show { display: flex; }
      .nav-links li { width: 100%; text-align: center; }
      .nav-links li a { display: block; padding: 12px; }
      .hero-title { font-size: 1.8rem; }
      .hero-features-grid, .card-grid-3, .card-grid-4, .testimonials-grid, .step-grid { grid-template-columns: 1fr; }
      .article-links-grid { grid-template-columns: 1fr 1fr; }
      .solution-item { flex-direction: column; }
      .solution-thumb { width: 100%; height: 180px; }
      .footer-grid { grid-template-columns: 1fr; }
    }